Tides STANDARD SPI 0607 6 5 PREDICT THE

Tides STANDARD: SPI 0607. 6. 5 PREDICT THE TYPES OF TIDES THAT OCCUR WHEN THE EARTH AND MOON OCCUPY VARIOUS POSITIONS.

TNReady Practice Question • Write your answer in the top right corner of your page.

Answer • The correct answer is D -Zach.

Activating • Raise your hand if you have ever been to the beach/ocean. • Turn to your neighbor and share your favorite thing about the beach. • Raise your hand if you ever went searching for sea shells during low tide? • Why is it best to look for shells during low tide? And not high tide? ? ?

What is a tide? • Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of Earth. • Video Clip: (2 mins) https: //www. youtube. com/watch? v=BAxrn Tn. KUi. E

Check for Understanding • What is a tide?

Answer • Tides are the rise and fall of sea levels.

What causes tides? • The gravitational forces exerted by the Moon and the Sun and • The rotation of the Earth. • Video Clip: (5 mins) https: //www. youtube. com/watch? v=3 Rdk. X s 8 Bib. E

Check for Understanding • What two factors cause tides?

Answer • The combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth.

Two Types of Tides • Spring and Neap • Video Clip: (42 sec) • https: //www. youtube. com/watch? v=19 h. J 2 F 0 t 76 k

Spring Tides • Does not mean that they occur in the spring!!! • Just means that the sea level appears to “spring” up and is even higher than normal high tide. • Which leaves even less ocean water for low tides, making them the lowest.

Check for Understanding • Explain how tides appear during spring tide. • What moon phases will produce spring tides?

Answers • During spring tides the water levels are the highest high tides and the lowest low tides. • Spring tides occur during new and full moon phases.

Neap Tides • Gravitational pull on ocean water is equal in all directions. • Very little change during high and low tide levels.

Check for Understanding • How do ocean levels change during neap tides? • What moon phases produce neap tides?

Answers • High tide and low tide are almost the same level. Very little change in the water level. • First and third quarter moon phases create neap tides.

Sand Key Lighthouse, FL • Measure of tide levels during the month of Feb. • Blue represents the water levels. • Notice the moon phases and corresponding water levels.

Thank you for learning about tides today.